func buildAuth(nodeName types.NodeName, client internalclientset.Interface, config componentconfig.KubeletConfiguration) (server.AuthInterface, error) {
// Get clients, if provided
var (
tokenClient authenticationclient.TokenReviewInterface
sarClient authorizationclient.SubjectAccessReviewInterface
)
if client != nil && !reflect.ValueOf(client).IsNil() {
tokenClient = client.Authentication().TokenReviews()
sarClient = client.Authorization().SubjectAccessReviews()
}
authenticator, err := buildAuthn(tokenClient, config.Authentication)
if err != nil {
return nil, err
}
attributes := server.NewNodeAuthorizerAttributesGetter(nodeName)
authorizer, err := buildAuthz(sarClient, config.Authorization)
if err != nil {
return nil, err
}
return server.NewKubeletAuth(authenticator, attributes, authorizer), nil
}